fix: ClawHub API and simplify Council nav

- Fix popular search query (was empty string)
- Group all agents under single 'Agents' tab

app/api/clawhub/route.ts

@@ -38,7 +38,8 @@ export async function GET(req: NextRequest) {
 
     if (action === "popular") {
       // Get featured/popular - show top skills sorted by score
-      const { stdout } = await execAsync(`clawhub search "" 2>&1`);
+      // Use a common query that returns high-quality skills
+      const { stdout } = await execAsync(`clawhub search "productivity automation" 2>&1`);
       const lines = stdout.trim().split("\n");
       const skills = lines
         .filter((line) => line.includes("("))